Hlau stainless Seamless yeeb ntau lawm Technology

a. bar noj; b. cua sov; c. kub perforating; d. tej taub hau e. Pickling; f. sib tsoo; g. lubrication; h. khaub thuas rolling ntawv I. Degreasing; j. heat-treatment tshuaj; k. wires; l. tej yeeb nkab; m. pickling; n. tiav khoom kuaj.